Progress summary of the Giant Magellan Telescope primary mirror off-axis segment active optics control system risk reduction effort: the Test Cell

Barbara Fischer; Trupti Ranka; Francisco Aguayo; David Ashby; Marianne Cox; Austin Everman; John Ford; Tomas Krasuski; Gary Muller; Wylie Rosenthal; David Schwartz; José Soto; Hector Swett; Divya Thanasekaran; Abhijit Wadhavkar

doi:10.1117/12.2630155

29 August 2022 Progress summary of the Giant Magellan Telescope primary mirror off-axis segment active optics control system risk reduction effort: the Test Cell

Barbara Fischer, Trupti Ranka, Francisco Aguayo, David Ashby, Marianne Cox, Austin Everman, John Ford, Tomas Krasuski, Gary Muller, Wylie Rosenthal, David Schwartz, José Soto, Hector Swett, Divya Thanasekaran, Abhijit Wadhavkar

Author Affiliations +

Proceedings Volume 12182, Ground-based and Airborne Telescopes IX; 121823G (2022) https://doi.org/10.1117/12.2630155
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

Large aperture telescopes require active control to maintain focus, collimation, and correct figure errors in the Primary Mirror (M1) due to gravity and thermal deformations. The Giant Magellan Telescope M1 active optics and thermal control systems called the M1 Subsystem (M1S) consists of the hardware and software that controls the shape, position, and thermal state of each mirror segment. A full-scale off-axis M1S prototype called the Test Cell is being fabricated and tested. The primary objective of the Test Cell is to mitigate risk by verifying that the mirror figure and position can be controlled within the image quality error budget and that the thermal control system vibration is within its system level allocation. The M1S components for the active optics support system have been fabricated, assembled, tested at the component level, and integrated into the Test Cell. The team completed the Test Readiness Review and started system level testing with the M1 Device Control Software. Lessons learned throughout the component and integrated system testing of the Test Cell will be incorporated into the M1S design for the production phase. This paper will summarize the progress of the Test Cell and results presented at the Test Readiness Review.

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Barbara Fischer, Trupti Ranka, Francisco Aguayo, David Ashby, Marianne Cox, Austin Everman, John Ford, Tomas Krasuski, Gary Muller, Wylie Rosenthal, David Schwartz, José Soto, Hector Swett, Divya Thanasekaran, and Abhijit Wadhavkar "Progress summary of the Giant Magellan Telescope primary mirror off-axis segment active optics control system risk reduction effort: the Test Cell", Proc. SPIE 12182, Ground-based and Airborne Telescopes IX, 121823G (29 August 2022); https://doi.org/10.1117/12.2630155

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